How does Mobile Deposit indentify and prevent fraud?

We require each item to be endorsed with the signature of the payee and "For Mobile Deposit at ELGA Credit Union"  This way, checks deposited through Mobile Deposit cannot be deposited again at a COPOCO Powered By ELGA Credit Union branch or another financial institution.  The Mobile Deposit approval process also includes a review of each deposited item, and automatically detects duplicate deposits.